Commercial-to-Residential Conversions near you

Before a single drawing is worth paying for, find out whether dwellings are a permitted use in the zone, how many units the site can hold, and what the change triggers on the rest of the property. Portland notes that a change may bring zoning requirements with it including parking, bike parking, pedestrian amenities and landscaping, depending on the zone and the intensity of the proposed use. Those are not decorative items; parking in particular can decide whether a conversion is feasible on a small lot.

Some cities have written conversion rules of their own rather than leaving it to general zoning. New York City's zoning resolution devotes an entire chapter to residential conversion within existing buildings, setting out where non-residential floor area may become dwelling units, joint living-work quarters for artists and community facilities with sleeping accommodations, and regulating density, light and air, minimum unit size, recreation space where enough units are created, and notice to prospective residents in mixed-use buildings. A city with that kind of chapter is telling you the answer is knowable in advance; a city without one is telling you to go and ask. Either way the pre-application meeting with planning is the cheapest hour in the project.

A change of occupancy classification is the legal hinge of a conversion. Portland's framing is that a change of use happens when a building or part of a building is used for something different than before, and where that moves the space into a different building code occupancy classification it is also a change of occupancy, with a permit required to document it even where no alterations are planned. The practical consequence is that the new use has to satisfy the requirements that attach to that use, not the ones that applied to the old one.

Accessibility is frequently underestimated, because a conversion often leaves some commercial space in the building or creates common areas, and state law can require money to be spent on barrier removal. Portland notes that state law requires up to 25 percent of the value of the total construction costs be spent removing existing architectural barriers to improve accessibility, following a priority order that begins with parking, then the accessible route to the entry, then the entry itself, then restrooms. That is a real budget line to plan for rather than discover.

Partial conversions deserve particular care. Where only part of a building changes to residential and it is not properly separated from the rest, the code consequences can reach the whole building rather than the portion being changed. This is the question to put to the building official in writing at the outset, because the answer governs the fire separation strategy and therefore much of the cost.

A dwelling unit has obligations an office does not. Habitable rooms need natural light and ventilation or an engineered substitute, sleeping rooms need a way out in an emergency, each unit needs a means of egress that does not depend on passing through another unit, and units have to be separated from each other and from any remaining commercial use for fire and, in most codes, for sound. Deep floor plates with windows on only one side are the recurring problem in office conversions, because bedrooms have to be near the glass and everything else has to fit behind them.

This is the difference that catches people who have only renovated houses. The federal asbestos standard for demolition and renovation applies to a facility, and the regulation defines a facility as any institutional, commercial, public, industrial or residential structure, installation or building, including any structure, installation or building containing condominiums or individual dwelling units operated as a residential cooperative, but excluding residential buildings having four or fewer dwelling units. A shop, an office, a school, a church or a warehouse is squarely inside that definition, whatever you intend to turn it into.

The first obligation arrives before work starts. The rule requires that, to determine which requirements apply and prior to the commencement of the demolition or renovation, the owner or operator thoroughly inspect the affected facility or part of the facility where the demolition or renovation operation will occur for the presence of asbestos, including Category I and Category II nonfriable asbestos-containing material. The inspection is not optional and it is not satisfied by a visual guess: the point is to know what is in the ceiling tile, the pipe insulation, the floor tile and the mastic before a crew starts pulling them out.

The thresholds then decide how much of the rule applies. In a facility being renovated, the full notification and work practice requirements apply if the combined amount of regulated asbestos-containing material to be stripped, removed, dislodged, cut, drilled or similarly disturbed is at least 260 linear feet on pipes or at least 160 square feet on other facility components, or at least 35 cubic feet off facility components where the length or area could not be measured. Written notice goes to the regulator at least 10 working days before asbestos stripping or removal work, or any other activity such as site preparation that would break up or disturb asbestos material, begins. States and local air agencies commonly administer this and several are stricter, so confirm locally rather than assuming the federal floor is the whole answer.

The federal lead renovation rule has a clause written for exactly this situation, and it is easy to miss because it sits at the end of a definition. The rule defines a renovation as the modification of any existing structure, or portion thereof, that results in the disturbance of painted surfaces, and then states that a renovation performed for the purpose of converting a building, or part of a building, into target housing or a child-occupied facility is a renovation under this subpart. In other words, a pre-1978 commercial building does not escape the rule on the grounds that nobody lived in it: if you are converting it into housing, the work is covered.

Two practical points follow. First, the small-job exemption will not help, because minor repair and maintenance activities are capped at 6 square feet or less of painted surface per room indoors and 20 square feet or less outdoors, exclude window replacement and demolition of painted surface areas, and treat jobs in the same room within 30 days as a single job. A conversion clears all of that on day one. Second, the program is not administered by EPA everywhere: EPA has authorized Alabama, Delaware, Georgia, Iowa, Kansas, Massachusetts, Mississippi, North Carolina, Oklahoma, Oregon, Rhode Island, Utah, Vermont and Wisconsin, along with one Minnesota Chippewa Tribe band, to run their own programs, so in those places the state or tribal program certifies the firm and enforces the rule.

Conversion budgets are dominated by things that are invisible in a real estate listing. The variables that move them are the number of dwelling units and therefore the number of kitchens, bathrooms and separations, whether a second means of egress has to be built, how much new opening has to be cut in structure for windows and escape, the capacity of the incoming electrical, water and sewer services and whether they must be upsized, the fire protection strategy including sprinklers, the results of the asbestos and lead surveys, the accessibility scope the jurisdiction requires, and the length of the zoning and permitting path. Ask for feasibility, design and construction to be priced as separate stages, because a conversion that fails on zoning should fail cheaply.

LokalMatch is where the search starts. You describe the building once: what it is now, how big it is, how many units you have in mind, its age, and whether you have spoken to the planning or building department yet. Contractors and firms working on this kind of project in your area receive the request and the interested ones contact you. Pros pay for the requests they receive, and there is no charge to homeowners. LokalMatch does not perform construction or design, does not set prices, and does not vet, rank or recommend anyone, so confirming licensing, insurance, the code study and the environmental surveys stays your responsibility.